CIE Physics Paper-1: Specimen Questions 12 - 13 of 109

Question number: 12

MCQ▾

Question

Table for results of different load and corresponding length carried out from experiment

Here in above table lists of measured extension of rubber band for different load are given.

Load (N)

0

1

2

3

Length (cm)

20

________

22.1

24

Extension (cm)

0

1.0

2.1

4

Choices

Choice (4) Response
a.

21.3 cm

b.

17 cm

c.

16 cm

d.

21 cm

Answer

d.

Explanation

Here due to load extension in length of rubber is taking places.

From first column, when load is zero, extension is zero so original length is 20.

Now as load increases, the length of rubber extended. Therefore for load 1 N, the extension of length is 1.0 cm.

And original length is 20

So missing figure in length is,

Length=Originallength+Extension

Length=20+1.0

Length=21cm

Question number: 13

MCQ▾

Question

What metal should be used to form a permanent magnet from a magnetizing coil on a piece of metal?

Magnetizing coil with metal road

Magnetizing coil with metal road

Figure shows a magnetizing coil wounded on a metal road and connected with battery

Choices

Choice (4) Response
a.

steel

b.

copper

c.

aluminum

d.

iron

Answer

a.

Explanation

Only iron and steel shows the magnetic effect during electric current flow in the coil. But steel is used to make permanent magnet because it would continue as magnet after the electricity switched off.

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